Audi Workshop Service and Repair Manuals

Fuel Pressure: Pressure, Vacuum and Temperature Specifications

Fuel Pressure at idle speed

Vacuum hose connected.............................................................................................................................................................3.2 - 3.8 bar positive pressure
Vacuum hose disconnected........................................................................................................................................................3.8 - 4.2 bar positive pressure

Residual Pressure after 10 min.

Cold engine...............................................................................................................................................................................about 2.2 bar positive pressure
Warm engine............................................................................................................................................................................about 3.0 bar positive pressure